Alarm for doors



(No Model.)

N. J. BUSBY.

ALARM FOR DOORS.

No. 351-,898. Patented Nov. 2, 1886.

In noor alarm applied thereto.

UNITED STATES PATENT OFFICE.

NAHUM J UDSON BUSBY, OF MAPLEWOOD, MASSACHUSETTS ALARM FOR o'oo s.

SPECIFICATION forming part of Letters Patent No. 351,898, dated November 2, 1886. Application filed August 16, 1886. Serial No. 210,994. (No mode Patented in Canada September 21, 188 6, No. 24,985.

To all whom it may concern:

Be it known that I, NAHUM J UDSON BUsBY, of Maplewood, in the county of Middlesex, of the Commonwealth of Massachusetts, have invented a new and useful Improvement in Alarms for Doors, &c., (for which I have obtained a patent in Canada, N 0; 24,985, hearing date September 21, 1886;) and I do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which Figure l is a transverse and vertical section of part of a door-frame and my improved bell Fig. 2 is a rear view of the bell-striking mechanism as it appears when the bell and the front disk of the wheel work sustaining frame are removed. Fig. 3 is a vertical section taken through the winding-arbor spring in a plane at right angles to such arbor.

The nature of my invention is duly defined in the claims hereinafter presented, one object of such invention being to enable a hell, on the knob used in sounding it being pulled, to be quickly and repeatedly, struck by its hammer, as is the case with what are termed electric bells, another purpose of it being to take up or compensate for the slacking of the actuatingwlre.

In the drawings, A denotes part of a doorframe to which the bell-pulling knob' of the entrance-door of a house is usually applied, the said knob being represented at B as jointed to a bell-crank lever, C, pivoted, as usual,within a stationary socketed carrier, D.

From the lever C a wire, E, leads upward to and through a hole, a, in an ear, I), extending from a bracket, F, to which is affixed the frame G, for supporting the bell H, the hammer I thereof, .and the-striking or operative mechanism of the latter. The wire Eat its upper end is fastened to a take-up spring, K, which consists of a piece of wire spirally coiled to form an eye, a, near its middle, or thereabouts, the parts d and e of suchwire extending from the. eye being arranged at or about a right angle to each other. The part d rests upon one of a series of posts, :1 that forms with two metallic disks, h and i, a frame for supporting the wheel-work and parts adjacent thereto, to be. described. The other portion, e, of the spring K is coiled-around and fixed in a shaft, k, extendingbetween and journaled in the two disks h and z. From the said shaft 70 a hooked wire or arm, Z, projects upward against one side of a scape-wheel, m, such wheel having a stud, n, extending from the said side of it with respect to the arm Z,

I in manner as represented. Pallets 0 0, carried by another shaft, p, from which the shank of ,the bell-hammer I projects, operate succes sively with and by the scape-wheel in order, while such'wheel may beinrevolution, to cause the hammer to repeatedly strike and sound a bell, H, which is supportedon a tubular projectioms, extending from the disk 1 and concentrically therewith. I The arbor t,-that sustains the scape-wheel, has fixed upon italantern-pinion, u,which.engages with a gear, 2), of a train of gears, '1; war, the gearx revolving loosely on the windingarbor To the winding-arbor of the gear as the inner end of a helical spring, 2, is fixed, the said spring at its outer end being fastened to one of the posts 9 of the wheel'work frame. There is fixed on the winding-arbor and aside of the gear x'a ratchet-wheel, a, with which a pawl, b, pivoted to the said-gear as, engages, and to which it is forced by a spring, 0'. y

A knob, 61, pivoted or 'properly'applied to the winding-arbor, on being revolved will revolve such arbor to enable the helical spring to becontracted, the pawl and the ratchetwheel serving to hold the spring from expanding so long as the arm Z may be hooked upon the stud n. Upon such arm being drawn away from the stud, as it will be when the knob B is pulled, and causes the wire E to draw downward the take-up spring or wire K,

the train will be set free and the bell will be repeatedly sounded until the stud it may bring up against-the hook of the arm Z, the said arm having been moved upward by the spring K on the knob being released from the hand that pulled it. To insure the upward move ment of the arm Z there is applied to it an auxiliary spring, 6, which at its upper end is secured in the disk i. In the place of a knob to be pulled and the bell-crank connected to it, other proper means for actuating the wire may be substituted.

From the above it will be seen that I have described,substantially, a common and wellknown mechanism for repeatedly sounding a ing the bell several times.

bell, and have combined with it and the knob and wire leading therefrom the angular spring K,which serves not only to take up any slack or stretching of the wire, but when pulled down by the wire to turn the shaft k sufiicient- 1y to cause the hooked arm Z to be moved downward out of engagement with the stud n. The wire E, after being passed through the eye a, is coiled about itself, the upper end of it serving with the ear b as means of arresting the knob in its backward pull.

Apparatus, as hereinbefore described, may be constructed so as to render it unnecessary to wind up the arbor of the helical or main spring oftener than once in a month, the mechanism at every pull of the knob rapidly sonnd- Irrespective of the knob, its Wire, the takeup spring K, and the ear I), I do not claim the bell and the remainder of the mechanism described for eiiecting the sounding of such hell; but

I claim- 1. The combination, with a bell and mechanism, substantially as described, for repeatedly sounding it, and with the operative wire provided with means of pulling it, as described, of the bent wire or take-up K, the frame G, having the shaft 7c, the hooked arm or catch Z, both the take-up K and catch 1 be- 0 ing secured to theshaft 7c, and the scape-wheel of the bell-sounding apparatus having the stud n,with which the catch 1 engages, as set forth.

2. The combination of the bell and its sounding mechanism and the supporting frame 5 thereof, provided with bracket arranged with such frame, as represented, saidbrackct having the ear, as described, with the door-knob and actuating-wire, the latter passing through the ear and coiled about itself, as described.

3. The bell and its sounding mechanism and its supporting-frame, and the bracket secured to the latter provided with the ear I), in combination with the take-up K, secured to such frame at the bell mechanism, the knob, and the 45 actuating-wire, the latter passing through the ear 6 and connected to the take-up K, as set forth.

NAHUM J UDSON BUSBY. 'Witnesses:

1%, H. EDDY, S. N. Pirnn, 

